Pollution is defined as the contamination of land, air or water. The invention of advanced vehicles and automobiles has led to air pollution. Fumes from traffic are responsible for releasing over 225,000 tonnes of lead into the atmosphere every year.
Lead is harmful for humans and animals. Harmful factory wastes dumped in the water bodies pollute water, and kill the first level organisms in a food chains, thereby putting the lives of other animals in peril.
Pollution is the most dreadful environmental problem. It triggers off several other problems which can never be solved entirely.
Acid rain is yet another outcome of pollution. Poisonous gases from power stations and vehicles merge with moisture present in the air. This ultimately falls as acid rain.
Acid raindamages plant, animals, buildings and some acid rain flows into rivers, lakes and seas. When mixed with water bodies, acid becomes a part of the water cycle. Gases are often carried to long distances by the wind. Hence, the pollution produced in one country can fall as acid rain in another.
Poisonous fumes from industries mix with rainwater and fall down as acid rain.
Acid rain adversely affects nature and buildings.